Telecommunication systems



March 10, 1959 -G. T. BAKER 77,

TELECOMMUNICATION SYSTEMS Filed Oct. 31, 1956 21 Sheets-$heet 1 IIIIIIIIII Ill FIG.|

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OUTPUT OF PHASE SHIFTER 1. A

OUTPUT OF BALANCED MODULATOR SIGNAL OUTPUT TO 6000, LINE FIG. 9.

G. T. BAKER I TELECOMMUNICATION SYSTEMS March 10, 1959 21 Sheets-Sheet 8 Filed Oct. 51, 1956 March 10, 1959 T. BAKER TELECOMMUNICATION SYSTEMS 21 Sheets-Shet 9 Filed Oct. 51, 1956 March 10, 1959 e. T. BAKER 2,877,306

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March 10, 1959 G. T. BAKER 2,877,306

TELECOMMUNICATION SYSTEMS i Filed Oct. 31, 1956 I 21 Sheets- Sheet 12 INPUT SIGNALPULSES FROM 600:2 LINE 1 OUTPUT OF FULL WAVE RECTIFIER A K N OUTPUTOF LOW PASS FILTER CIRCUIT 203') W OUTPUT OF RINGING CIRCUIT OUTPUTOF PHASE SHIFTER 2 v March 10, 1959 cal T. BAKER I 2,877,306

' TELECOMMUNICATION SYSTEMS Fil ed Oct. 51, 1956 21 Sheets-Sheet 1s March 10, 1959 I G. T. BAKER 2,377,306

TELECOMMUNICATION SYSTEMS Filed Oct. 31, 1956 I 21 Sheets-Sheet 14 .March 10, 1959 .Filed 0ct. 31, 41956 G. T. BAKER TELECOMMUNICATION SYSTEMS 21 Sheets-Sheet 15 March 10, 1959 G. T. BAKER 0 YTELECOMMUNICATION SYSTEMS v Filed Oct. 51, 1956 21 Sheets-Sheet 1e 0 Y l l l I "l STROBEtsI 4W 1W??? I WW G. T. BAKER mmcommumcuzon SYSTEMS.

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March 10, 1959 G. T. BAKER 2,877,306

TELECOMMUNICATION SYSTEMS Filed Oct. :51, 1956 l 21 Sheets-Sheet 1s SLC SR F1629.

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TELECOMMUNICATION SYSTEMS Filed Oct. 31. 1956 21 Sheets-Sheet 2O 

